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Timing in Biological News

Environmental cues control reproductive timing and longevity, University of Minnesota study shows

When humans and animals delay reproduction because food or other resources are scarce, they may live longer to increase the impact of reproduction, according to a new study by University of Minnesota researchers published in the June 25 issue of PLoS (Public Library of Science) One . The disco...

Brain's timing linked with timescales of the natural visual world

Researchers have long attempted to unravel the cryptic code used by the neurons of the brain to represent our visual world. By studying the way the brain rapidly and precisely encodes natural visual events that occur on a slower timescale, a team of Harvard bioengineers and brain scientists from t...

Global changes alter the timing of plant growth, scientists say

Any gardener knows--different plant species mature at different times. Scientists studying plant communities in natural habitats call this phenomenon "complementarity." It allows many species to co-exist because it reduces overlap in the time period when species compete for limited resources. Now, ...

Novel pathway regulates timing of brain cell development

Brain formation involves the carefully timed production of different types of nerve cells by neural stem cells: neurons are produced first, then astrocytes. Making too much of one kind of cell and too little of another at a given time could lead to brain malformations. In the October 6 issue of Cel...

Genetic snooze button governs timing of spring flowers

In the long, dark days of winter, gardeners are known to count the days until spring. Now, scientists have learned, some plants do exactly the same thing. Addressing scientists here today (Aug. 9) at a meeting of the American Society of Plant Biologists, University of Wisconsin-Madison researche...

Internal body clock dictates timing of different types of stroke

The internal body clock, or circadian rhythm, seems to influence the timing of different types of stroke, suggests research published ahead of print in the Journal of Neurology Neurosurgery and Psychiatry. The research team analysed data from almost 13,000 patients who had had one of three types...

Precise Timing Enabled Pig-to-rat Transplants To Cure Diabetes

Scientists at Washington University School of Medicine in St. Louis have learned that a temporal "window of opportunity" was critical to their earlier successes in treating diabetic rats with embryonic pig tissues. In those experiments, published in 2004, researchers were surprised to find that ...

Women often opt to surgically remove their breasts, ovaries to reduce cancer risk

...ngdom. Evans and colleagues assessed the increase in risk-reduction surgery among women with breast cancer and evaluated the impact of cancer risk, timing and age. Rate of increase was measured among 211 women with known unaffected BRCA1 or BRCA2 mutation carriers. BRCA1 and BRCA2 are hereditary gene...

August 2009 Geology and GSA Today media highlights

...the Mississippi deltaic plain, where rapid disappearance of wetlands may have exacerbated damage caused by Hurricanes Katrina and Rita. Until now, the timing and location of avulsions has been notoriously difficult to predict. Using scaled-physical experiments of deltas at the Exxon Mobil Research Lab, Edmo...

Naming evolution's winners and losers

.... Interestingly, their findings do not coincide with traditional scientific explanations for why there are so many mammals, birds and fish. "The timing of the rate increases does not correspond to the appearance of key characteristics that have been invoked to explain the evolutionary success of these...

Fox Chase researchers uncover one force behind the MYC oncogene in many cancers

...sents a much more 'druggable' target for cancer inhibition." According to Testa, DLX5 is a member of the homeobox family of genes, which direct the timing of events in the physical development of a growing fetus, such as when to sprout a limb, for example. In adults, such genes are almost entirely inacti...

A genetic basis for schizophrenia

...determined that Disc1 regulates two stem cell maintenance factors that have many functions in CNC cells, including the maintenance of precursor pools, timing of migration onset and the induction of cell differentiation. The authors showed that Disc1 disruption results in increased expression of these factor...

Study on keeping nuclear bombs from US ports shows misplaced fear over cargo scanning cost

...iative (CSI), can be cumbersome and costly. "The CSI and SFI protocols differ in the pool of containers targeted for inspection, as well as both the timing and tools used for preliminary inspection," the paper explains. "The CSI inspection process is geared exclusively towards US-bound containers, it b...

The SIB recognizes the next generation of bioinformaticians

... Mr. Roux looked at how evolutionary changes are limited by the extent they affect the development of an organism, and focused specifically on how the timing of expression in development affects selective pressure on genes. In his own words: "Because embryonic development must proceed correctly for an anima...

Study highlights massive imbalances in global fertilizer use

...here over-fertilization is a problem, the authors cited a number of techniques to reduce environmental damage. "Some of these--such as better-targeted timing and placement of nutrient inputs, modifications to livestock diets and the preservation or restoration of riparian vegetation strips--can be implement...

Omega-3 fatty acids appear to impact AMD progression

...a-3 fatty acids, antioxidants and low-GI foods may delay compromised vision due to AMD," says Taylor. "The present study adds the possibility that the timing of a dietary intervention as well as the combination of nutrients recommended may be important." AMD is a progressive disease that attacks central ...

UC Davis begins $2.8 million in studies of agricultural nitrogen's impacts

...rms are difficult to monitor. Measurements can be labor-intensive and expensive and are influenced by variables such as weather conditions, irrigation timing and method, and crop-specific fertilization practices. The new studies should improve data-collection methods, said Agricultural Sustainability Ins...

Dioxins in food chain linked to breastfeeding ills

...number of ductal branches and mature lobules in the mammary tissue. The timing of dioxin exposure also seemed to be significant, the study noted. For exam...r from the cellular injury. However, although it is important to understand timing of exposure for research purposes, it is irrelevant for humans, who cannot ...

USC researchers present diabetes findings at American Diabetes Association Scientific Sessions

...Peters will discuss recommendations and guidelines including how long diabetes patients should exercise, what type of exercise is most beneficial, and timing medication to avoid a precipitous drop on blood sugar following workouts. The symposium will take place on Saturday, June 6 (Session: Fueling the Seri...

IFAR contributes to study that finds genes that influence the start of menstruation

... two years after the onset of puberty. This study provides the first evidence of common genetic variants that influence the normal variation in the timing of female sexual maturation. The researchers say these findings are significant because girls with an earlier age at menarche tend to have a greater b...

Caltech scientists reveal how neuronal activity is timed in brain's memory-making circuits

... a brain area critical for the formation of new memories. For several decades these oscillations were believed to be "in sync" across the hippocampus, timing the firing of neurons like a sort of central pacemaker. A new study conducted by researchers at the California Institute of Technology (Caltech) argue...

Study may aid efforts to prevent uncontrolled cell division in cancer

... even though both cell volume and the length of the contractile ring are reduced during successive rounds of embryonic cell division the duration or timing of cell division remains the same. Their study will be published in the May 29 issue of the journal Cell . "We showed that contractile rings const...

Study finds genetic links to age of first menstrual period and menopause

...hts into the genetic factors influencing the timing of menarche and natural menopause might shed light...istical power and revealed a total of two loci for timing of menarche and four for timing of menopause." Chasman, also an assistant professo...

Mothers give interloper's offspring a head start in life

...y extra-pair offspring are laid earlier or even why females choose to mate with extra-pair males," said Dr Magrath. One explanation could be in the timing of copulations. Females may engage in extra-pair matings to guard against the possibility that their social partner is infertile. "Because females...

MIT: Making waves in the brain

... combining several genetic tricks, we were able to express ChR2 in different classes of neurons, allowing us to manipulate their activity with precise timing via a laser and an optical fiber over the brain," explains co-lead author Marie Carln, a postdoctoral fellow at the Picower Institute. The trick f...

Entrust's New Code-Signing Certificates Enhance Trust in Applications, Software Developers

...ion reduces administrative hassles and lessens the risk of inadvertent certificate expiration by allowing organizations to synchronize and control the timing of SSL certificate expiration. The Entrust Certificate Management Service also enables administrators to "re-use" or "recycle" SSL certificates for ma...

A biological basis for the 8-hour workday?

...sue culture cells uncovered only genes that cycled on a 24-hour rhythm and showed no evidence of the shorter oscillations, suggesting that some of the timing cues are systemically controlled and some are controlled by the cell itself. Feeding appears to control one of the 12-hour gene expression peaks. M...

Using combinatorial libraries to engineer genetic circuits advances synthetic biology

...t the next step with a genetic timer, a more complicated circuit. However, computer simulation, on its own, was unable to predict the behavior of this timing circuit. They then built a representative genetic timer using a promoter from each of their libraries and, over time, tracked its behavior. Based on ...

Researchers report 'moderately large' potential for red tide outbreak in Gulf of Maine region

...e economy. Advance warning of a potentially troublesome year for algae can give shellfish farmers and fishermen time to make contingency plans for the timing of their harvest or expansion of aquaculture beds; state agencies can make informed staffing decisions to accommodate additional monitoring that might...

Marine scientists warn of potential for spring, summer red tide outbreak in Gulf of Maine

... Advance warning of a potentially troublesome year for harmful algae can give shellfish farmers and fishermen time to make contingency plans for the timing of their harvest or expansion of aquaculture beds. State agencies can make informed staffing decisions to accommodate additional monitoring that mi...

Allscripts Integrates Electronic Health Records with Innovative Patient Kiosk

...the important factors that could cause actual results to differ materially from those indicated by such forward-looking statements are: the volume and timing of systems sales and installations; length of sales cycles and the installation process; the possibility that products will not achieve or sustain mar...

Diet secrets of 'the Royals'

...the elephants are finding it harder to compete with the cattle than with the poachers." The study also showed an intricate interplay in the timing of the rainy season, the growth of grass, when the elephants eat grass, and when they breed and give birth. When rains begin, satellite mea...

For cancer cells, genetics alone is poor indicator for drug response

...ce proteins in orderly, uniform ways, like an assembly line, but they don't," says Sorger. "Rather, cells produce proteins in fits and starts, and the timing and degree varies from one cell to the nexteven cells that are identical in every way. This randomness is something that we're just beginning to appre...

Nanofarming technology harvest biofuel oils without harming algae

...we will dramatically increase the reality of renewable energy," said Catilin's CEO, Larry Lenhart. "Given the Obama administration's objectives, the timing is perfect." ...

AIBS names 2009 emerging public policy leaders

...iticians fosters the development of sound policies." Roddy's Ph.D. research in integrative biology examines flower physiology and phenology or the timing of development in relation to climate. Roddy is working to understand how flower water requirements may relate to broader ecosystem dynamics, such as...

Hopkins scientists ID 10 genes associated with a risk factor for sudden cardiac death

...kes the prediction of sudden cardiac death largely dependent on genetic risk factors. Having identified 10 common variants of genes that modify the timing of the contraction of the heart, known as the QT interval, scientists in the Johns Hopkins University School of Medicine, in collaboration with an int...

Missing piece of plant clock found

...le that will appear in the same issue of Science . Evidence increasingly points to the clock as a critical component of functions growth and the timing of flowering. A recent paper published in Nature by a group at the University of Texas, Austin reports that an altered clock contributes to hybrid vig...

Cleaning up oil spills can kill more fish than spills themselves, say Queen's biologists

...e know how deadly dispersed oil is, it is important to assess the risks of diesel spills to fish and fisheries in terms of the spill location, and the timing relative to fish spawning and development." ...

Empire State Stem Cell Board awards $12.7 million to Albert Einstein College of Medicine

...Ira Leon Rennert Professor of Stem Cell Biology and Regenerative Medicine $971,489 Characterization of iPS using a novel high throughput replication timing assay. Mukesh Kumar, Ph.D., instructor in medicine $240,000 Manipulation of stem cells for treating viral hepatitis. "We are very pleased ...

Ocean's journey towards the center of the Earth

...nia and New Guinea, we saw a large number of similarities between New Caledonia and northern New Zealand in terms of geology, structure, volcanism and timing of geological events. "We then searched deep within the Earth for proof of a connection and found the evidence 1100 km below the Tasman Sea in the...
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